Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec7400205d8a8c3…

MALICIOUS

PDF

93.7 KB Created: 2021-06-14 03:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5093fc3f6b1071b6617f286f76b45ea SHA-1: eda0d0db9b04578476c63e11445d066e665d7cd0 SHA-256: 3ec7400205d8a8c3af22056f0cc4e306961288ce9f6ac5715fb26829a5778d00
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one prominent URL identified as a potential phishing or malware distribution point. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting malicious intent. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://queure.ru/pbw?utm_term=old+christmas+song
    • https://rolavakewuxilo.weebly.com/uploads/1/3/1/4/131407047/vumagarafitos.pdf
    • https://cdn-cms.f-static.net/uploads/4410702/normal_600a771e46195.pdf
    • https://vabejodero.weebly.com/uploads/1/3/4/3/134378136/dc782b6.pdf
    • https://static.s123-cdn-static.com/uploads/4503197/normal_5fde9d67dd755.pdf
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/lofutajejirolu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/13b512b2-d8ae-41fb-b3c2-26520d277a44/masterbuilt_oil_free_turkey_fryer_directions.pdf
    • http://lodenapokot.pbworks.com/w/file/fetch/144791655/roson.pdf
    • http://wefolevemud.pbworks.com/f/35701346723.pdf
    • http://xuresasadox.pbworks.com/f/lesson_2.4_practice_a_geometry_answers_mcdougal_littell.pdf
    • http://nemupaludol.pbworks.com/f/zobaxokosupaxewug.pdf
    • http://detomipipu.pbworks.com/w/file/fetch/144664965/atwood_gc6aa-10e_parts.pdf
    • https://uploads.strikinglycdn.com/files/40b5fa41-15d5-40d0-9550-c21a2aee894f/beretta_92fs_compact_wood_grips.pdf
    • https://uploads.strikinglycdn.com/files/462c32b7-1126-45b5-a7c9-0945b7333809/shadow_puppets_printable_free.pdf
    • https://uploads.strikinglycdn.com/files/8b245c92-a5b5-47a2-a978-e77c6288d0d1/how_to_download_tutuapp_vip_for_free.pdf
    • http://jajisaparev.pbworks.com/w/file/fetch/144411690/zefaseratujerituxidivu.pdf
    • http://sapixesut.pbworks.com/f/ccleaner_pro_android_license_key.pdf
    • http://xetibubib.pbworks.com/w/file/fetch/144418017/how_to_pass_minnesota_road_test.pdf
    • http://wuxewuda.pbworks.com/w/file/fetch/144938703/29421210798.pdf
    • http://kepigiwup.pbworks.com/f/47328864248.pdf
    • https://uploads.strikinglycdn.com/files/90baac0f-d91d-4220-8627-b143d4897f4b/is_there_a_reset_button_on_my_keurig_2.0.pdf
    • http://kakewizajupe.pbworks.com/f/65263424966.pdf
    • http://sozakuvepar.pbworks.com/f/burger_king_coupons_canada_march_2021.pdf
    • http://fatakalewene.pbworks.com/f/bollywood_4k_video_songs_free_download.pdf
    • http://dowiginade.pbworks.com/w/file/fetch/145209663/rauwolfia_serpentina.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132e8.bin
5b8ccc79f34eb981d0573db84f2b4ab425a118850bc2a480357e2004ef5b32ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E8 5380 bytes
font_01_sfnt_off000144ff.bin
88915f1ce01a247382b0c59c0de83b92c255a4fc289076d4150971ee68c42f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144FF 10576 bytes

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